Increasing Zn2+ in cells would be potentially useful but we don't have a way to do it. Zinc dynamics in cells turn out to be really complicated. There are the following proteins that carry Zn into cells:ZnT-1, ZnT-5, ZnT-6, ZnT-7, ZnT-9, Zip1, Zip6, Zip7, Zip14, and TRPC6. There are also...